The author analyzes the principles and practices that shaped Renaissance architecture, emphasizing its departure from medieval building methods and its complex relationship with classical models. He evaluates structural achievements such as the great dome and assesses constructional ingenuity alongside aesthetic shortcomings in order usage and ornament. Church design, civic and domestic architecture receive detailed study through measured examples and technical diagrams, while the role of painting and decorative taste in shaping architectural form is considered. The text combines critical history, constructive analysis, and illustrated comparisons to clarify the character and limitations of Renaissance building.